Serial Port Timer

I need to test for closure between two pins on Com2 and set a timer between the 'clicks'.  The timer is easy enough, but I don't know how to test for input from the serial port. I am currently using an old DOS program to do this with pins 2 and 5.
emcdanielAsked:
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ZifNabCommented:
Input from commport or only from pin 2 and 5?

Like always, a lot of compenents are already on the net for input from a commport. And a lot are good ones. The one I use and I find it very good, calls TCommPortDriver. You can find it on Torry's delphi pages. It's freeware.

Have fun,
c.u. ZifNab;
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altenaCommented:
Look up the "WaitCommEvent" functio in the Win32 API.

You should span 1 thread to monitor the Comm port.
Waitcommevent will allow you to time anything you want to time.

Good Luck.
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